Shovel loading machine



Oct. 18, 1949. G, E, COATS' 2,485,139

SHOVEL LOADING MACHINE Oct. 18, 1949. G. E. coATs 2,485,139

SHOVEL LOADING MACHINE Filed April 23, 1947 3 Sheets-Sheet 2 'IIO 92 Oct. 18, 1949. G, E COATs 2,485,139

sHovEL LOADING MACHINE:

Filed April 25. 1947 5 Sheets-Sheet 3 INVENToR. @ff/Aber? E. @ai'f Poema oa. Is.

um'riu srA'rEs PATENTA orales 2,185.1 GZTT Application April 23, 1947, Serial No. 743,28.

3 Claim. (Cl. 214-139) is to provide an is maintained in a near level or horizontalposition at all moved positions ofthe llift frame.

Another object oi' this invention is to provide a tractor loader attachment in vwhich the litt arms are of a relatively short overall length and assembled with a load carrying unit such that the unit is maintained in a near level position at all moved positions of the littarms.

l A further object of this invention is to provide a tractor loader attachment having a lpair of lift arms pivoted on an upright frame, in which a bucking force, during a scoop loading operation, is applied to the tractor i'rame so that the litt arms and upright frame are relieved of'such torce.

YStill another object of this invention is to provide a tractor loader attachment which is of a compact and rugged construction, readily assembled with andremoved from a tractor, adapted to be` mounted forwardly of the tractor-operators seat and of a height to afford the operator iull visibility in the operation of the tractor and loader.

A feature of this invention is round in the provision of a tractor mounted loader attachment in which a pair oi' pivoted lift arms are pivoted at their rear ends on an upright frame, located forwardly of the tractor operators seat, for up and down pivotal movement. Disposed above the liit arms are a pair of stabilizing arms which are pivoted on the upright frame, and movably connected with a scoop, carried between the free ends of the lift arms, through a pivoted frame Estructure such that the scoop, on being elevated,

Yet a further feature of this invention is found in the provision of la loader attachment i'or a tractor, in which a mainV horizontal frame is positionable about the tractor trame and secured thereto. 'I'he front portion of thevmain frame projects forwardly of the tractor i'rame and car ries an upright trame which has a top section supported for up and down movement. The top section is moved by a hydraulic cylinder carried on the projected main frame portion, with such movement-in an upward direction being limited by coacting stop .means on the top'section and the base of the upright frame. A pair ci pivoted liit'arms, arranged at opposite sides of the tractor frame,`V are connected by cables with the top section so as tovbe lowered and raised in response to anoperatlon of the hydraulic cylinder. a

Further objects. features and advantages of 'this invention will become apparent from the fol- 20 the accompanying drawings, in which:

lowing description when taken in connection with l Fig. l is a side elevational view cfa usual farm tractor shown in assembly relation with the loader attachment of this.invention; with parts of the tractor being removed to more clearly show this assembly;

Fig. 2 isan enlarged sectional view taken on theline2-2inFlg.1;

Fig. 3 is a fragmentary perspective view of the front endw of the litt frame, with the scoop being removed vso as to show the relative assembly of the litt frame with the scoop stabilizing structure;

Fig. 4 isa plan view of the tractor and loader assembly shownin Fig. 1:

Fig. 5 -is an enlarged sectional detail view of the scoop latch mechanism. as seenV along the line 5-5 in Fig. 4;

Fig. 6 is a sectional detail view of the lift mechanism taken on the line 6-6 in Fig. 2; and

Fig. 7 is a sectional detail view as seen on the With reference to the "drawings, the loader attachment of this inventionA isk illustrated in Figs. 1 and 4 in assembly relation with a usual type farm tractor having a main frame I0, a rear axle housing Il, traction wheels l2, iront steering wheels Il, and an engine i4 equipped with an oil pumprumt indicated at I6..

o1 the machine, in a lowered position oi' the lift frame, whereby any bucking force applied on the lift frame is transmitted to the main frame.

the tractor frame Il which .are secured at their rear ends Il to the rear axle housing Il (Figs. 1

.and 4). The frame members Il. adjacent their 3. front ends, are secured to the tractor, as indicated at 2l, and projectforwardly ahead of the tractor.

A transverse brace member 22 (Fig. 2) located forwardly of the tractor, is connected between the front ends of the frame members i3.

Mounted on the loader main frame at a position intermediate the wheels I2 and I3 and forwardly of the tractor operators seat 23, is a rear upright. frameM-(Figs. 1 a-xidgi)l comprised of a pair of upright/angle members '23 arranged at opposite sides of the tractor frame I3 secured at their lower ends to the frame men' ll bers I8. A brace member 21 connects the upright angle members 23 at a position spacedfrom their upper ends, with the frame 24 being'supported against tilting movement by forwardly and downwardly inclined braces 23 secured'attheirlower ends to the frame members i3. Y

A load carrying unit or scoop 23 is pivotally .supported at 3| between the front ends of a pair `wardly in a parallel relation with the arms 32.` It

seen, therefore, that the lift arm extensions ffiiv` s .nggl 33a" are oifset laterally outwardly from ,thegiarms 32 and 32a, respectively.

best appears in Fig. 3, the lift'arms 32 and 32a land connecting member 34 are of a pipe or ,tube'construction, while theextensions -3l and 30a are of an angle construction. Gusset plates '36 are welded `between the arms 32 and 32a and the laterally projected ends of the connecting member 34. The scoop 23 is of a width substantially equal to the distance between the lift arm extensions u ao no and in its mported position on the pivots 3l is located forwardly'of the connecting member 34. l

` By virtue of the pivoted support of the lii't arms 32 and 32a on the upright frame 24, at a position forwardly of the tractor operator's seat 23, the lift arms are of a relatively short length. As a result, if the scoop 23 was held against movement relative to the lift on elevation ofthe lift arms it would be tilted rearwardly at 'an angle such that a large portion of the material carried in the scoop would be dumped rearwardly over the tractor front end, prior to any dumping movement of the scoop. In order to prevent such an occurrence, and to hold the scoop 23 in a loadholding or near level position during its movement to a dumpfposition, there is provided a scoop stabilizing mechanism which` includes a pair of `stabilizing arms 31 (Figs. 1 and 4) which are aradjustable forward sections-33 which' have theirv front ends pivoted at 4I to the upper-ends of a pair of transversely spaced uprights 42 which 4 3). 'I'he uprights 42 are of a bar construction and `are connected together adjacent their lower ends jrxiexni'rei connected:y between its Vfrontend and 4v'an-upright" 42. The front ends of theextensions ,43 are pivoted on the pivots 3| for the scoop 29.

f' It is seen, therefore, that the frame 43 has a rear upright section, comprised ofthe angle members y44 alr'1'd43, and the uprights 42, which ls arranged between the rear wall 33 of the scoop 23 and the connecting member 34, and forward extensions 43, of a'iiat bar construction, arranged in a straddling relation with the scoop 23 and pivoted at their front ends on the scoop pivots 3i.' `'Iihe frame 431s thuspivotallyconnected between' the front. extensions 30,. and 33a of the lift larms `32 and 32a and the Afront",adjustable exten- .sions 33 of the stabilizing arms 31. The stabilizing arms 31 areof aA tubular construction, and telescopically receive their extensions, which are also of atubular construction. ,The extensions 33 are held in an adjusted position'by the `provision of lock or friction Ascrews 5I threadable within the stabilizing arms 31 for bearing engagement against the extensions 33.

The latch mechanism for the vscoop 23 (Figs.

3 and 5) is `carried on the pivoted frame 43 and includes a rock shaft ,l2 rockably supported in bearings 53 mounted on the top side of the upper angle. in the pivoted frame 43. The rock shaft 52 extends over vapproximately one-half of the length' of the upper angle v'43 and is integrally formed at its inner endv with an upright rock arm I4, the free end of which is loosely received in an elongated slot 36 formed in a rearextension 31 on the upper end of a latch member 53.. The .lower end of the latch member I3 is pivotally supported at I3 on the upper angle 43 and is formed intermediate its ends with anupright elongated slot 3| for releasably engaging-a stop member 32 on the scoop back 33. 'l The rock shaft l2 is biased in a counter-clockwise direction, as viewed in Fig. 3, to maintain the latch 33 laan-engaging position with the catch or stop 32 by the provision cfa coil spring 33 connected between a rock arm A34, at the outer end of the shaft 52 and a bracemcmber 49.

'I'he free end of the rock arm 64 is pivotally connected to the forward end of an actuating lever 33 (Iiigsl and 3) which extends upwardly and rearwardly for slidable support of its rear end in th'eupright frame 24. 'A hand grip 61, integral as'the lift arms 32 and32a are elevated, the scoop 23, by virtue of its connection with the pivoted frame 43 through the latch mechanism-on the upper angle 43, is progressively tipped forwardly bythe pivoted action of the stabilizing arms 3.1.

Stated otherwise, -as' the lift arms 32 and 32a are elevated from their full line position in Fig. 1,

form. of a pivoted frame structure 4l (Fig. "l5 2l. As also shown in dotted lines at B yin Fig. 1,

On elevation of the lift arms 02 and 02a vto their raised position, illustrated in dotted lines-at A in Fig. l, the scoop 29 is dumped by pulling rearwardly on the lever whereby the latch Il is pulled out of engagement with the catch 02.

The hoisting mechanism for raising and lowering the arms includes a front upright frame 68 (Fig. 2) which has a bottom section comprised of a pair of oppositely arranged upright channel members 69 and 09a secured at their lower ends to opposite ends of the front transverse member 22 of the loader main frame. The channel members 69 and 69a are' faced outwardly and are adapted to receive therein upright tubularvmembers 1| which are welded to the channel members 09 and 69a.

A top section for the upright frame includes a' transverse head member10 of a hollow construei tion, having a pair of downwardly extended tubular members 12 which are slidably receivable within the upright tubular 4members 1I of the bottom section. Rotatably supported in the head member 10 are pairs of oppositely arranged pulleys 13 and 13a and 14 and 14a (Figs. 2 and 6) with the pulleys 13 and 13a being arranged in a common plane rearwardly of a common plane for the pulleys 14 and 14a. Further, each pair-of adjacent pulleys-13 and 14, and 13a and 14a are arranged at opposite sides of a slidable tube member 12.

A cable 16 is attached at one end 1l to the channel member 69a and extends upwardly for travel over the pulley 14a, longitudinally of the head member 10 for travel about the pulley 14 and then downwardly for connection of its opposite end 19 with the lifting arm 22. A second cable 8| is attached at its end 02 to the upright channel 69 and extends upwardly for travel over the pulley 13, longitudinally of the head member 10 for passage over the pulley 13a and then downwardly for the connection of its opposite end 04 with the lift arm 22a. The cables 'Il and 0I,

by virtue of the oset relation of the pulleys 10 and 13a relative to the pulleys 14 and 14a, are

. .thus in a clearance relation within the head member 10. Guide rollers 00 carried at opposite ends of the head member 1I, serve to maintain the cables 16 and 9| within the pulleys 19a and 14, respectively, at all moved positions of the lift arms.

The cables 1B and 0| are raisedk and lowered by the provision of an upright hydraulic cylinder 89 mounted at a central position on the transverse connecting member` 22 and having a piston 9| connected at 92 with the head member 10. Fluid under pressure is supplied to the cylinder through a conduit 93 connected with the tractor-operated pump unit I6.

On raising of the piston 9| the cables 10 and 0I are concurrently lengthened between their attached ends 10 and 02 and the pulleys 14a and 13, respectively, 'and decreased in length between their attached ends 19 and and the pulleys 'I4 and 13a, so that a balanced lifting action is applied on the lift arms 32 and 32a..

The upward movement lof the head member 10 tion within the upright tubes 1| (Fig. 2). The lower ends of the rods 94 are mounted on bottom cover members 09 for the upright tubes 1I. l The rod members 94 are slidably extended through cap members 90 provided at lthe lower ends oi' the slidable tubes 12, which cap members are engageable with stop members 91 at the upper ends of the rods 94 to dene anuppermost position of the head member 10.` On a lowering of the head member 10, the rods 94 extend upwardly within the slidable tubes 12.

Carried at the forward ends of the frame members I0 are a pair of hook members 99 (Figs. 2 and 7) which have their hook portions I 0I opened upwardly and extended in a forward direction. When .the scoop 29 is in its lowered position, illustrated in full lines in Fig. l, the transverse con- `necting member I34, between the lift arms l2 and 32a, is received within the hook portions III. Thus on the application of a bucking force on the scoop 29, when the scoop is being loaded, this force is transmitted through the lift arm extensions 30 and connecting member 34 against the hooks 99 and through the frame members I8 to the tractor frame I0.

As a result. the lift arms 32 and 32a and the upright frame 24 are substantially free of the bucking force impact. The frame 24y is thus subjected only to the load carried in the scoop 29 during its elevation from its full line position to its dotted line position A, illustrated in Fig. 1.

The dumping movement of the scoop 29, on release of the latch 59, is limited by the provision of a coil spring |02 (Fig. 1) connected at its upper end to a forward extension I 03 on the head member 10 and at its lower end to a chain |04 which extends downwardly about a pulley |06 mounted on the upper angle 49 for connection at |01 with the rear wall 00 of the scoop 29.

From a consideration of the above description it is seen that the linvention provides a tractor loader attachment adapted to be readily assembled with and removed from a tractor, ap-

plicable to tractors with short wheel bases. and eiilcient in operation to raise a load to a relatively high elevation, while maintaining the scoop in a substantially near level position. The attachment is of a compact design and does not in any way interfere with a normal storage of the tractor in a machine shed or with the'visibility `of the tractor operator in the maneuverability of the tractor and operation of the loader.

Although the invention has been described with I respect to a preferred embodiment thereof, it is to be understood that it is not to be so limited y since changes can be made therein which are within the full intended scope of this invention. as defined by the appended claims.

I claim: A

l. A loading machine including a portable 3 frame, an upright frame on said portable frame.

is limited by the provision of means including rod f a pair of lift arms arranged at opposite sides of said portable frame having their rear ends pivoted on said upright frame, a pair of stabilizing arms arranged at opposite sides of said portable frame at positions above said lift arms and pivoted at their rear ends on said upright frame, a load carrying unit, pivot meansfor supporting said load carrying unit between the front ends of said lift arms, a pivoted frame including an upright portion located rearwardlyv of said load carrying unit and pivoted at its upper end with the front ends of said stabilizing arms, forward extensions on said upright portion arranged to opposite sides of said load carrying unit and u pivoted at their front ends on said pivot means assenso for the load carrying unit, a latch mechanism for said load carrying unit mounted on said upright portion, andmeans for raising and lowering said lift arms.

2. A loading attachment for a tractor having a frame comprising, a main horizontal frame adapted to be secured to said tractor frame and including a front portion extended forwardly from said tractor frame, forwardly projected hook members on said front portion, an upright frame on said main trame, a lift frame having its rear end pivoted on said upright frame, aI

transverse brace member adjacent the front end of said lift frame at a position so as to be received within said hook members when the lift frame is in a lowered position, and means for raising and lowering said lift frame.

3. In a loading machine having a main frame and a lift frame pivoted at its rear end .on said main frame, an uprightframe mounted on the front end of said main frame including a bottom section having a pair of upright tubular members spaced transversely of-said main frame, rod members coaxiaily extended within said upright members, stop members on said rod members at positions spaced upwardly from the lower ends of said upright tubular members, a movable top section including a head member having downwardly extended tubular movable members movabiy supported within saidgo main frame between said upright tubular members` and having a piston connected with said head member.

almaar n coa'rs.

ammonia crrnn The following references are of record in the ille oi this patent:

UNrrnDs'ra'rm Pam'rs Number Name Date 2,300,731 Knarreboi'g Nov. 3, 1942 2,301,102 Werthman et al. Nov. 3, 1942 2,306,313 Johnson' Dec. 22, 1942 2,393,299- Denning...` Jan. 22, 1946 2,398,964 Rogers et ai. Apr. 23, 1946 2,402,908 Neville et al. June 25, 1946 2,426,544

Wooldridge aug. 2s, 1947 

